Portable warning light for use in vehicles



FIG. 1 is a front elevation view showing a portable warning light for use in vehicles in accordance with our design, with the broken line showing for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a side view thereof, the portable warning light for use in vehicles appearing the same from the opposite side;

FIG. 5 is a rear view thereof, the rear of our portable warning light for use in vehicles not encompassing any design features; and,

FIG. 6 is a perspective view thereof. 

The ornamental design for a portable warning light for use in vehicles, as shown and described. 